backend/tests/test_products_serialize.py

@@ -170,3 +170,27 @@ def test_inv12_roundtrip_is_noop_over_generated_catalogs():
         assert result.summary["updates"] == 0, f"seed {seed}: {result.summary}"
         assert result.summary["errors"] == 0, f"seed {seed}: {result.summary}"
         assert result.summary["unchanged"] == len(catalog), f"seed {seed}"
+
+
+from decimal import Decimal
+
+
+def test_decimal_and_int_variant_fields_roundtrip():
+    catalog = {
+        "priced": CatalogProduct(
+            id=1, handle="priced", title="Priced",
+            option_names=(None, None, None),
+            fields={"title": "Priced", "description_html": None, "vendor": None,
+                    "product_type": "standalone", "google_product_category": None,
+                    "tags": [], "status": "active", "published": True},
+            variants=[CatalogVariant(
+                id=1, options=(None, None, None), position=1,
+                fields={"sku": "P1", "price": Decimal("18.00"),
+                        "cost": Decimal("9.5"), "weight": Decimal("0.250"),
+                        "inventory_qty": 40, "variant_image": None})],
+            images=[],
+        )
+    }
+    result = _roundtrip_diff(catalog)
+    assert result.summary["unchanged"] == 1, result.records
+    assert result.summary["updates"] == 0